701 KB0 KB199220252023Bavec, AljošaBlatnik, OlgaKokalj, MarkoLežaič, LukaMitrović, GoranPlavc, GaberPretnar-Hartman, KatrinaSočan, AljažStrojan, PrimožŠvajger, UrbanTešić, Natašaštevilka:4letnik:57str. 538-549DOI:10.2478/raon-2023-0052ISSN:1318-2099COBISSID:173952003URN:URN:NBN:SI:doc-WS7VWSW1enCroatian Medical Association - Croatian Society of RadiologySlovenian Medical Society - Section of RadiologyRadiology and oncology (Ljubljana)kserostomijamesenchymal stromal stem cellsMezenhimske matične celicemezenhimske stromalne matične celiceorofaringealni rakoropharyngeal cancerRak (medicina)xerostomiaPost-radiation xerostomia therapy with allogeneic mesenchymal stromal stem cells in patients with head and neck cancer| study protocol for phase I clinical trial|Background: Xerostomia is a common side effect of radiotherapy in patients with head and neck tumors that negatively affects quality of life. There is no known effective standard treatment for xerostomia. Here, we present the study protocol used to evaluate the safety and preliminary efficacy of allogeneic mesenchymal stromal stem cells (MSCs) derived from umbilical cord tissue. Methods: Ten oropharyngeal cancer patients with post-radiation xerostomia and no evidence of disease recurrence 2 or more years after (chemo)irradiation (intervention group) and 10 healthy volunteers (control group) will be enrolled in this nonrandomized, open-label, phase I exploratory study. MSCs from umbilical cord tissue will be inserted under ultrasound guidance into both parotid glands and both submandibular glands of the patients. Toxicity of the procedure will be assessed according to CTCAE v5.0 criteria at days 0, 1, 5, 28, and 120. Efficacy will be assessed by measuring salivary flow and analyzing its composition, scintigraphic evaluation of MSC grafting, retention, and migration, and questionnaires measuring subjective xerostomia and quality of life. In addition, the radiological, functional, and morphological characteristics of the salivary tissue will be assessed before, at 4 weeks, and at 4 months after the procedure. In the control group subjects, only salivary flow rate and salivary composition will be determined. Discussion: The use of allogeneic MSCs from umbilical cord tissue represents an innovative approach for the treatment of xerostomia after radiation. Due to the noninvasive collection procedure, flexibility of cryobanking, and biological advantages, xerostomia therapy using allogeneic MSCs from umbilical cord tissue may have an advantage over other similar therapiesTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo radiologije in onkologije